/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:28:12,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:28:12,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:28:13,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:28:13,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:28:13,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:28:13,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:28:13,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:28:13,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:28:13,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:28:13,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:28:13,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:28:13,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:28:13,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:28:13,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:28:13,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:28:13,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:28:13,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:28:13,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:28:13,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:28:13,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:28:13,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:28:13,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:28:13,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:28:13,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:28:13,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:28:13,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:28:13,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:28:13,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:28:13,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:28:13,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:28:13,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:28:13,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:28:13,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:28:13,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:28:13,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:28:13,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:28:13,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:28:13,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:28:13,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:28:13,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:28:13,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:28:13,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:28:13,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:28:13,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:28:13,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:28:13,129 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:28:13,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:28:13,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:28:13,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:28:13,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:28:13,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:28:13,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:28:13,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:28:13,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:28:13,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:28:13,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:28:13,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:28:13,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:28:13,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:28:13,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:28:13,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:28:13,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:28:13,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:28:13,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:28:13,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:28:13,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:28:13,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:28:13,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:28:13,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:28:13,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:28:13,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:28:13,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:28:13,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:28:13,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:28:13,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:28:13,471 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:28:13,472 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-21 13:28:13,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600f59235/6397f7f5af4e4555a7cc085744e82210/FLAG121a62b86 [2020-08-21 13:28:14,035 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:28:14,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-2.c [2020-08-21 13:28:14,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600f59235/6397f7f5af4e4555a7cc085744e82210/FLAG121a62b86 [2020-08-21 13:28:14,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/600f59235/6397f7f5af4e4555a7cc085744e82210 [2020-08-21 13:28:14,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:28:14,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:28:14,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:28:14,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:28:14,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:28:14,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14, skipping insertion in model container [2020-08-21 13:28:14,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:28:14,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:28:14,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:28:14,683 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:28:14,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:28:14,823 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:28:14,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14 WrapperNode [2020-08-21 13:28:14,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:28:14,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:28:14,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:28:14,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:28:14,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... [2020-08-21 13:28:14,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:28:14,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:28:14,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:28:14,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:28:14,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:28:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:28:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:28:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 13:28:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 13:28:14,925 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 13:28:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 13:28:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 13:28:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 13:28:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 13:28:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:28:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:28:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 13:28:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 13:28:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:28:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:28:14,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:28:15,460 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:28:15,461 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 13:28:15,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:15 BoogieIcfgContainer [2020-08-21 13:28:15,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:28:15,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:28:15,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:28:15,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:28:15,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:28:14" (1/3) ... [2020-08-21 13:28:15,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c31fcc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:28:15, skipping insertion in model container [2020-08-21 13:28:15,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:28:14" (2/3) ... [2020-08-21 13:28:15,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c31fcc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:28:15, skipping insertion in model container [2020-08-21 13:28:15,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:28:15" (3/3) ... [2020-08-21 13:28:15,476 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-08-21 13:28:15,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:28:15,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:28:15,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:28:15,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:28:15,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:28:15,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:28:15,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:28:15,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:28:15,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:28:15,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:28:15,534 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:28:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-08-21 13:28:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:15,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:15,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:15,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:15,576 INFO L82 PathProgramCache]: Analyzing trace with hash 742963907, now seen corresponding path program 1 times [2020-08-21 13:28:15,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:15,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312555345] [2020-08-21 13:28:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:15,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:16,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312555345] [2020-08-21 13:28:16,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:16,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:28:16,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982849380] [2020-08-21 13:28:16,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:28:16,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:28:16,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:28:16,223 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 10 states. [2020-08-21 13:28:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:18,999 INFO L93 Difference]: Finished difference Result 552 states and 918 transitions. [2020-08-21 13:28:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:28:19,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 13:28:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:19,027 INFO L225 Difference]: With dead ends: 552 [2020-08-21 13:28:19,028 INFO L226 Difference]: Without dead ends: 416 [2020-08-21 13:28:19,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:28:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-21 13:28:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 234. [2020-08-21 13:28:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-21 13:28:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-08-21 13:28:19,165 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 70 [2020-08-21 13:28:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:19,166 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-08-21 13:28:19,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:28:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-08-21 13:28:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:19,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:19,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:28:19,171 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1190139517, now seen corresponding path program 1 times [2020-08-21 13:28:19,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:19,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047193630] [2020-08-21 13:28:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:19,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047193630] [2020-08-21 13:28:19,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:19,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:28:19,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145578056] [2020-08-21 13:28:19,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:28:19,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:28:19,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:28:19,428 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 10 states. [2020-08-21 13:28:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:22,407 INFO L93 Difference]: Finished difference Result 805 states and 1159 transitions. [2020-08-21 13:28:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:28:22,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 13:28:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:22,423 INFO L225 Difference]: With dead ends: 805 [2020-08-21 13:28:22,426 INFO L226 Difference]: Without dead ends: 598 [2020-08-21 13:28:22,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:28:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-08-21 13:28:22,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 360. [2020-08-21 13:28:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 13:28:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2020-08-21 13:28:22,543 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 70 [2020-08-21 13:28:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:22,544 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2020-08-21 13:28:22,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:28:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2020-08-21 13:28:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:22,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:22,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:22,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:28:22,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1543227899, now seen corresponding path program 1 times [2020-08-21 13:28:22,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:22,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586703701] [2020-08-21 13:28:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:22,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586703701] [2020-08-21 13:28:22,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:22,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 13:28:22,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386311903] [2020-08-21 13:28:22,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:28:22,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:28:22,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:28:22,860 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand 11 states. [2020-08-21 13:28:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:24,503 INFO L93 Difference]: Finished difference Result 858 states and 1207 transitions. [2020-08-21 13:28:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:28:24,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-21 13:28:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:24,510 INFO L225 Difference]: With dead ends: 858 [2020-08-21 13:28:24,510 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 13:28:24,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:28:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 13:28:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 365. [2020-08-21 13:28:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-08-21 13:28:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 479 transitions. [2020-08-21 13:28:24,578 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 479 transitions. Word has length 70 [2020-08-21 13:28:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:24,580 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 479 transitions. [2020-08-21 13:28:24,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:28:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 479 transitions. [2020-08-21 13:28:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:24,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:24,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:24,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:28:24,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash 507756099, now seen corresponding path program 1 times [2020-08-21 13:28:24,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:24,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430798481] [2020-08-21 13:28:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:24,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430798481] [2020-08-21 13:28:24,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:24,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:28:24,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074097147] [2020-08-21 13:28:24,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:28:24,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:28:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:28:24,844 INFO L87 Difference]: Start difference. First operand 365 states and 479 transitions. Second operand 10 states. [2020-08-21 13:28:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:27,465 INFO L93 Difference]: Finished difference Result 1300 states and 1859 transitions. [2020-08-21 13:28:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 13:28:27,466 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 13:28:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:27,473 INFO L225 Difference]: With dead ends: 1300 [2020-08-21 13:28:27,474 INFO L226 Difference]: Without dead ends: 978 [2020-08-21 13:28:27,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:28:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-08-21 13:28:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 691. [2020-08-21 13:28:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-08-21 13:28:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 892 transitions. [2020-08-21 13:28:27,565 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 892 transitions. Word has length 70 [2020-08-21 13:28:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:27,566 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 892 transitions. [2020-08-21 13:28:27,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:28:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 892 transitions. [2020-08-21 13:28:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:27,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:27,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:27,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:28:27,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1263714876, now seen corresponding path program 1 times [2020-08-21 13:28:27,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:27,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086402236] [2020-08-21 13:28:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:27,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086402236] [2020-08-21 13:28:27,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:27,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 13:28:27,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941664458] [2020-08-21 13:28:27,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:28:27,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:27,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:28:27,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:28:27,812 INFO L87 Difference]: Start difference. First operand 691 states and 892 transitions. Second operand 11 states. [2020-08-21 13:28:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:29,587 INFO L93 Difference]: Finished difference Result 1616 states and 2202 transitions. [2020-08-21 13:28:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:28:29,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-08-21 13:28:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:29,598 INFO L225 Difference]: With dead ends: 1616 [2020-08-21 13:28:29,599 INFO L226 Difference]: Without dead ends: 968 [2020-08-21 13:28:29,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:28:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-21 13:28:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 706. [2020-08-21 13:28:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-08-21 13:28:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2020-08-21 13:28:29,752 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 70 [2020-08-21 13:28:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:29,753 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2020-08-21 13:28:29,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:28:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2020-08-21 13:28:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:29,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:29,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:29,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:28:29,756 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1123166266, now seen corresponding path program 1 times [2020-08-21 13:28:29,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:29,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674330827] [2020-08-21 13:28:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:28:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:28:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 13:28:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:28:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:28:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 13:28:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:28:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:28:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 13:28:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:30,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 13:28:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:28:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:28:30,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674330827] [2020-08-21 13:28:30,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:28:30,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:28:30,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291861856] [2020-08-21 13:28:30,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:28:30,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:28:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:28:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:28:30,022 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand 10 states. [2020-08-21 13:28:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:28:32,434 INFO L93 Difference]: Finished difference Result 1675 states and 2255 transitions. [2020-08-21 13:28:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 13:28:32,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-08-21 13:28:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:28:32,451 INFO L225 Difference]: With dead ends: 1675 [2020-08-21 13:28:32,451 INFO L226 Difference]: Without dead ends: 1111 [2020-08-21 13:28:32,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-08-21 13:28:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2020-08-21 13:28:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 722. [2020-08-21 13:28:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-08-21 13:28:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 913 transitions. [2020-08-21 13:28:32,533 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 913 transitions. Word has length 70 [2020-08-21 13:28:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:28:32,534 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 913 transitions. [2020-08-21 13:28:32,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:28:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 913 transitions. [2020-08-21 13:28:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 13:28:32,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:28:32,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:28:32,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:28:32,540 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:28:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:28:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1940814716, now seen corresponding path program 1 times [2020-08-21 13:28:32,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:28:32,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286309997] [2020-08-21 13:28:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:28:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:28:32,565 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:28:32,566 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:28:32,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:28:32,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:28:32 BoogieIcfgContainer [2020-08-21 13:28:32,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:28:32,612 INFO L168 Benchmark]: Toolchain (without parser) took 18197.45 ms. Allocated memory was 140.0 MB in the beginning and 431.5 MB in the end (delta: 291.5 MB). Free memory was 101.3 MB in the beginning and 93.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 299.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:28:32,613 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:28:32,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.80 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 101.1 MB in the beginning and 179.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:28:32,624 INFO L168 Benchmark]: Boogie Preprocessor took 45.49 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:28:32,624 INFO L168 Benchmark]: RCFGBuilder took 596.51 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 144.8 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:28:32,629 INFO L168 Benchmark]: TraceAbstraction took 17137.59 ms. Allocated memory was 202.4 MB in the beginning and 431.5 MB in the end (delta: 229.1 MB). Free memory was 144.8 MB in the beginning and 93.1 MB in the end (delta: 51.8 MB). Peak memory consumption was 280.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:28:32,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 412.80 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 101.1 MB in the beginning and 179.2 MB in the end (delta: -78.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.49 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 596.51 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 144.8 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17137.59 ms. Allocated memory was 202.4 MB in the beginning and 431.5 MB in the end (delta: 229.1 MB). Free memory was 144.8 MB in the beginning and 93.1 MB in the end (delta: 51.8 MB). Peak memory consumption was 280.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int q_buf_0 ; [L16] int q_free ; [L17] int q_read_ev ; [L18] int q_write_ev ; [L19] int q_req_up ; [L20] int q_ev ; [L41] int p_num_write ; [L42] int p_last_write ; [L43] int p_dw_st ; [L44] int p_dw_pc ; [L45] int p_dw_i ; [L46] int c_num_read ; [L47] int c_last_read ; [L48] int c_dr_st ; [L49] int c_dr_pc ; [L50] int c_dr_i ; [L154] static int a_t ; [L456] int __retres1 ; [L460] CALL init_model() [L442] q_free = 1 [L443] q_write_ev = 2 [L444] q_read_ev = q_write_ev [L445] p_num_write = 0 [L446] p_dw_pc = 0 [L447] p_dw_i = 1 [L448] c_num_read = 0 [L449] c_dr_pc = 0 [L450] c_dr_i = 1 [L460] RET init_model() [L461] CALL start_simulation() [L396] int kernel_st ; [L397] int tmp ; [L401] kernel_st = 0 [L402] CALL update_channels() [L212] COND FALSE !((int )q_req_up == 1) [L402] RET update_channels() [L403] CALL init_threads() [L227] COND TRUE (int )p_dw_i == 1 [L228] p_dw_st = 0 [L232] COND TRUE (int )c_dr_i == 1 [L233] c_dr_st = 0 [L403] RET init_threads() [L404] CALL fire_delta_events() [L265] COND FALSE !((int )q_read_ev == 0) [L270] COND FALSE !((int )q_write_ev == 0) [L404] RET fire_delta_events() [L405] CALL activate_threads() [L298] int tmp ; [L299] int tmp___0 ; [L303] CALL, EXPR is_do_write_p_triggered() [L52] int __retres1 ; [L55] COND FALSE !((int )p_dw_pc == 1) [L65] __retres1 = 0 [L67] return (__retres1); [L303] RET, EXPR is_do_write_p_triggered() [L303] tmp = is_do_write_p_triggered() [L305] COND FALSE !(\read(tmp)) [L311] CALL, EXPR is_do_read_c_triggered() [L71] int __retres1 ; [L74] COND FALSE !((int )c_dr_pc == 1) [L84] __retres1 = 0 [L86] return (__retres1); [L311] RET, EXPR is_do_read_c_triggered() [L311] tmp___0 = is_do_read_c_triggered() [L313] COND FALSE !(\read(tmp___0)) [L405] RET activate_threads() [L406] CALL reset_delta_events() [L283] COND FALSE !((int )q_read_ev == 1) [L288] COND FALSE !((int )q_write_ev == 1) [L406] RET reset_delta_events() [L409] COND TRUE 1 [L412] kernel_st = 1 [L413] CALL eval() [L323] int tmp ; [L324] int tmp___0 ; [L325] int tmp___1 ; [L329] COND TRUE 1 [L332] CALL, EXPR exists_runnable_thread() [L242] int __retres1 ; [L245] COND TRUE (int )p_dw_st == 0 [L246] __retres1 = 1 [L258] return (__retres1); [L332] RET, EXPR exists_runnable_thread() [L332] tmp___1 = exists_runnable_thread() [L334] COND TRUE \read(tmp___1) [L339] COND TRUE (int )p_dw_st == 0 [L341] tmp = __VERIFIER_nondet_int() [L343] COND FALSE !(\read(tmp)) [L349] CALL error() [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 20 procedures, 140 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.0s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 986 SDtfs, 3575 SDslu, 1133 SDs, 0 SdLazy, 8330 SolverSat, 2224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=722occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 6 MinimizatonAttempts, 1534 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 490 NumberOfCodeBlocks, 490 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 91356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...